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0psi on boiler

roryconor
roryconor Member Posts: 1
in Oil Heating
I noticed my pressure relief valve dripping checked expansion tank it had 20 psi then I looked at the gauge which read 0 PSI I added water which triggered the relief  valve  I’m not sure if I have a refill loop or what to do next any suggestions would be appreciated 
thank you 

Comments

  • Jamie Hall
    Jamie Hall Member Posts: 24,556
    The next thing to do is to trot over to Home Depot or someplace like that, get a cheap gauge and adapters to hook it up to a hose bibb or drain valve on your system and hook it up -- and see what the pressure really is. Odds are that the gauge you are reading is lying to you...
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • Dave Carpentier
    Dave Carpentier Member Posts: 620
    Would a drain valve tend to belch dirt into that gauge ?
    And.. just in case you cant get the drain valve closed, they do make hosebib "caps". Good to have one of those handy.
    30+ yrs in telecom outside plant.
    Currently in building maintenance.
  • hot_rod
    hot_rod Member Posts: 23,108
    Are you checking the air charge in the expansion tank? The tire stem at the end?
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • pedmec
    pedmec Member Posts: 1,026
    Sounds to me like you might have no water in the boiler due to the relief valve is not closing. When you go to fill it's just leaking out. Get a relief valve if you're going to the depot. you can always keep it on the shelf if i'm wrong.

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